Feiedeich a



(No Model.)

- P. A. BRUNS.

VENTILATOR AND AIR PURIPIER FOR RAILROAD CARS.

Patented Dec. 27,1881.

INVENTOR I ATTORNEY N PETERi Pholohflwgraphcr, Washington. D. c.

' To all whom it may concern:

' UNITED STATES PATENT OFFICE.

FRIEDRICH A. BRUNS, OF NEW YORK, N. Y.

VENTILATOR AND Al R-PURlFlER F OR RAILROAD-CARS.

SPECIFICATION formingpart of Letters Patent No. 251,407, dated December27, 1881. Application filcd September 16,1881. (N0 model.)

Be it known that I, FRIEDRICH A. BRUNS, of the city, county, and Stateof New York, havein vented certain new and useful Improvements inVentilators and Air-Purifiers for Railroad-Cars, of which the followingis a specification.

The object of this invention is to furnish for railroad-cars, especiallyfor passenger and sleeping cars, an improved apparatus by which the airsupplied to the car is purified of all cinders, dust, smoke, and otherimpurities and distributed in the interior of the car, so as to keep thesame properly ventilated without the necessity of opening thewindow's,and conduce thereby to the greater comfort of the passengers.

The invention consists of an apparatus by which the air is drawn in fromthe outside of the car by a suitable air suction and forcing apparatusset in motion by a belt-and-pulley connection with one of thetruck-axles. The air is drawn first through a screened receptacle filledwith bone-black for retaining the cinders, and then forced through abrine-tank at the interior of the car, from which the air is conductedto the interior of the car and distributed in any approved manner.

In the accompanying drawings, Figure 1 represents a sectional sideelevation of a passenger-car with my improved apparatus for ventilatin gthe car and purifying the air supplied thereto. Fig. 2 is a detailvertical longitudinal section of my improved apparatus, and Fig. 3 adetail side view of the air suction and forcing apparatus and itspulley-connection with the motion-transmitting belt.

Similar letters of reference indicate corresponding parts.

My improved apparatus for purifying the airsuppliedtopassengerandsleepingcars consists, essentially, of threeparts: first, of a receptacle containing bone-black, charcoal, onsimilarmaterial; secondly, of a tank or reservoir containing brine, which isarranged at the inside of the car, preferably in the watercloset orstoreroom of the same; and, thirdly, of an air suction and forcingapparatus arranged intermediately between the bone-black receptacle andthe brine-tank, for supplying the required quantity of air.

Referring to the drawings, A represents the bone-black receptacle, whichis arranged near the roof of the car and extended through the roof tothe outside of the same, and provided with screens, which retain thebone-black or other material, so that cindcrs and other coarseimpurities are retained therein. The air is drawn through receptacle Aand a. connectingpipe, a, by any approved air suction and forcingapparatus, B, and conducted from the same through pipe b to the bottomof a cylindrical tank, 0, near whichitis emitted through afinely-perforated cross-pipe, d, so that the air is compelled to pass ina minutely-divided state through the liquidpreferably brine-arith whichthe tank is filled.

At about midway of the height of the brinetank 0 is arranged a screen,0, which serves for the purpose of distributing the air-bubblesuniformly and securing the contact of the same with the brine, andconsequently the retention of all finer impurities and smoke which havepassed through the bone-black receptacle. The air is then conductedthrough alargerconduit-pipe, f, to the interior of the car anddistributed in any suitable manner within the car.

The bone-black receptacle A has a screen at the top, but is inclosed atthe inside of the car by a casing, A.

The air-forcing apparatus consists of a blower, E, which is supported ona guided and spring-cushioned bed-plate, C, which is supported onbrackets D of the wall, so as to avoid the influence of the jerks andvibrations of the car uponthe air-forcing apparatus and keep up theregular motion of the same.

The belt-and-pulley transmission of the airforcing apparatus is onlyworked when the car is traveling in one direction, it being at rest whenthe car is moved in opposite direction. This is accomplished by a looseand fixed pulley, g, g, placed on the shaft of the air-forcingapparatus,in connection with asuitable clutch device, as shown in detailin Fig. 3. The pulley g is loose on the blower-shaft h, and is connectedby a belt, 11, with a pulley on one of the car-axles. It is also free toslide on said shaft between the stop j and the fixed'pulley g. The faceof the loose pulley 1 next the fixed pulley gis provided with an angularor ratchet-shaped projection, which fits into a corresponding recess inthe adjoining face of the fixed pulley. When the car is moving forwardthe two pulleys are clutched together, and the fixed pulley, andconsequently the blower, is driven by the belt on the loose pulley. Whenthe motion of the car, and consequently of the loose pulley, isreversed, the pressure'is upon the inclined sides of the ratchet-toothand recess, and the loose pulley is forced out of contact with'tbe fixedpulley, whereby the blower is stopped.

The brine-tank U is provided with a watergage and stop-cock at thebottom, also with a supply-pipe at the top, so that the quantity-ofbrine can be controlled and the same drawn off and refilled from time totime, as required.

By this apparatus the air is supplied in a perfectly pure state to thecar. If desired, it can be heated or cooled before being distributed bypassing it either through a heater or an ice-receptacle. By ventilatingthe car in this manner the dust and cinders, which form one of the mainobjections to the present otherwise well-fitted passenger and sleepingcars, are removed.

Having thus described myiuvention,I claim as new and desire to secure byLetters Paten t- 1. An apparatus for purifying the air of railroad-cars,consisting of a screened bone-black receptacle for retaining the coarseimpurities,

of an intermediate air suction and forcing apparatus, and of abrine-tank, through which the air is forced in a minutely-divided stateto remove the finer impurities, substantially as and for the purpose setforth.

2. In an apparatus for purifying the air of railroad-cars, thecombination of a screened bone-black receptacle communicating with theouter air, of an intermediate air suction and forcing apparatus drivenby connection with one of the truck-axles, and of a brine tank orreservoir through which the air is passed in a minutelydivided state,all substantially as set forth.

3. The combination, in an air-forcing apparatus for railroad cars, of ascreened bone-black receptacle communicating'with the outer air, of anair suction and forcing apparatus, and of a brine-tank having anair-conducting pipe which-is provided atits lower end with a perforatedcross-pipe, substantially as specified.

In testimony that I claim the foregoing as my invention I have signed myname, in presence oftwo witnesses, this 12th day of September, 1881.

FRIEDRICH A. BRUNS.

Witnesses PAUL GoEPEL, CARL 'KARP.

